<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片列表内容区 -->
    <el-card class="box-card">
      <!-- 文字提示区域 -->
      <el-alert title="注意：只允许为三级分类设置相关参数" type="warning" show-icon :closable="false"></el-alert>
      <!-- 条件参数区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            v-model="selectedKeys"
            :options="cateList"
            :props="catCasProps"
            @change="catCasChange"
            clearable
            filterable
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            icon="el-icon-plus"
            :disabled="isBtnDisabled"
            @click="addParamsVisible = true"
          >新增参数</el-button>
          <el-table :data="manyCateList" border stripe>
            <el-table-column type="expand" width="55">
              <template slot-scope="scope">
                <div class="taleft">
                  <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClosed(i,scope.row)">{{item}}</el-tag>
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ 添加标签</el-button>
                </div>
              </template>
            </el-table-column>
            <el-table-column type="index" label="序号" width="55"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEidtDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="deleteRolesById(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            icon="el-icon-plus"
            :disabled="isBtnDisabled"
            @click="addParamsVisible = true"
          >新增属性</el-button>
          <el-table :data="onlyCateList" border stripe>
            <el-table-column type="expand" width="55">
              <template slot-scope="scope">
                <div class="taleft">
                  <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClosed(i,scope.row)">{{item}}</el-tag>
                  <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)"
                  >
                  </el-input>
                  <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ 添加标签</el-button>
                </div>
              </template>
            </el-table-column>
            <el-table-column type="index" label="序号" width="55"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEidtDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="deleteRolesById(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加dialog -->
    <el-dialog
      :title="'添加' + titleText + '信息'"
      :visible.sync="addParamsVisible"
      width="40%"
      :close-on-click-modal="false"
      @close="addFormClosed"
    >
      <!-- 表单区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
        class="demo-ruleForm"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addParamsVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改dialog -->
    <el-dialog
      :title="'修改' + titleText + '信息'"
      :visible.sync="editParamsVisible"
      width="40%"
      :close-on-click-modal="false"
      @close="editFormClosed"
    >
      <!-- 表单区域 -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
        class="demo-ruleForm"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editParamsVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      cateList: [],
      catCasProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      selectedKeys: [],
      activeName: "many",
      manyCateList: [],
      onlyCateList: [],
      addParamsVisible: false,
      editParamsVisible: false,
      addForm: {
        attr_name: "",
      },
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      editForm: {},
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类列表失败");
      this.cateList = res.data;
    },
    catCasChange() {
      this.getParamsData();
    },
    handleTabClick() {
      this.getParamsData();
    },
    async getParamsData() {
      if (this.selectedKeys.length != 3) {
        this.selectedKeys = [];
        this.manyCateList = [];
        this.onlyCateList = [];
        return;
      }
      const { data: res } = await this.$http.get(
        `categories/${this.catId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      );
      if (res.meta.status !== 200)
        return this.$message.error("获取商品" + this.titleText + "列表失败");
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [];
        item.inputVisible = false;
        item.inputValue = '';
      });
      if (this.activeName === "many") {
        this.manyCateList = res.data;
      } else {
        this.onlyCateList = res.data;
      }
    },
    addFormClosed() {
      this.$refs.addFormRef.resetFields();
    },
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        //向服务器发起请求
        const { data: res } = await this.$http.post(
          `categories/${this.catId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 201)
          return this.$message.error("新增" + this.titleText + "失败");
        this.getParamsData();
        this.$message.success("新增" + this.titleText + "成功");
        this.addParamsVisible = false;
      });
    },
    async showEidtDialog(attrId){
      const { data: res } = await this.$http.get(`categories/${this.catId}/attributes/${attrId}`);
      if (res.meta.status !== 200)
        return this.$message.error(this.titleText + "信息获取失败");
      this.editForm = res.data;
      this.editParamsVisible = true;
    },
    async editParams(){
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        //向服务器发起请求
        const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 200) return this.$message.error(this.titleText + "修改失败");
        this.getParamsData();
        this.$message.success(this.titleText + "修改成功");
        this.editParamsVisible = false;
      });
    },
    editFormClosed() {
      this.editForm = {};
      this.$refs.editFormRef.resetFields();
    },
    async deleteRolesById(attrId){
      const result = await this.$confirm("确认删除此条" + this.titleText + "吗?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      }).catch(error => error);
      if(result !== "confirm") return this.$message.info("已取消删除");
      const {data: res} = await await this.$http.delete(`categories/${this.catId}/attributes/${attrId}`);
      if(res.meta.status !== 200) return this.$message.error(this.titleText + "删除失败");
      this.$message.success(this.titleText + "删除成功");
      this.getParamsData();
    },
    async handleInputConfirm(attr){
      if(attr.inputValue.trim().length === 0){
        attr.inputValue = '';
        attr.inputVisible = false;
        return;
      }
      attr.attr_vals.push(attr.inputValue.trim());
      attr.inputValue = '';
      attr.inputVisible = false;
      this.saveAttrData(attr);
    },
    showInput(attr){
      attr.inputVisible = true;
      this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    handleClosed(index, attr){
      attr.attr_vals.splice(index,1);
      this.saveAttrData(attr);
    },
    async saveAttrData(attr){
      const { data: res } = await this.$http.put(`categories/${this.catId}/attributes/${attr.attr_id}`,
          {
            attr_name: attr.attr_name,
            attr_sel: this.activeName,
            attr_vals: attr.attr_vals.join(' ')
          }
        );
        if (res.meta.status !== 200) return this.$message.error(this.titleText + "标签修改失败");
        this.$message.success(this.titleText + "标签修改成功");
    }
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedKeys.length !== 3) {
        return true;
      }
      return false;
    },
    catId() {
      if (this.selectedKeys.length === 3) {
        return this.selectedKeys[2];
      }
      return null;
    },
    titleText() {
      if (this.activeName === "many") {
        return "动态参数";
      } else {
        return "静态属性";
      }
    },
  },
};
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag{
  margin:10px;
}
.taleft{
  text-align: left;
}
.input-new-tag{
  width: 120px;
}
</style>